Snapped bolt please help.

[adamt]

The other day I was bolting back on my top engine tie bar into the block & my worst nightmare happened as I was tightening the bolt it sheered off in the engine block. & things have now just got worse as I’ve tried 3 different types for bolt extractors & none of them moved the bolt, with the last one snapping off in the hole I drilled in the centre of the bolt. So I’m quickly running out of ideas on what to do next. I’d be worried if I try drill the whole bolt out & tap it again that the block is going to get destroyed before the bolt will. Does anyone have any suggestions for me?? Cheers

[adamt]

Well finally I’ve had some joy with this I found this item in mini spares so I thought I show it in case anyone else is in the same boat. Thanks anyway.

http://www.minispares.com/Product.aspx?pid=32758

[Merlin]

uhhh hate that all i can say dood is to,
center punch the centre of the bolt. then start with a small drill bit like a 2.5mm and work your way up till you have removed the hole ting then tap it out.
i think there 7/16 unf
so dont drill biger that 5/16 but check the bolt befour you drill.